<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

    <!--使用Thymeleaf发送html邮件-->
    <p>你好，<span style="color: aqua" th:text="${username}"></span></p>

</body>
</html>